The SPT0406A-3R9K-PF is a TDK Corporation power inductor. It is designed for use in DC-DC converters and other power supply applications where a low-profile, high-performance inductor is needed.

Applications:

• DC-DC converters
• Power supplies for portable devices
• Voltage regulators
• LED lighting drivers
• Filtering circuits

Features:

• Low profile, suitable for space-constrained applications
• High inductance value (3.9μH)
• High current capability
• Shielded construction to minimize EMI
• Excellent DC bias characteristics

Benefits:

• Enables efficient power conversion in compact devices.
• Reduces electromagnetic interference, improving system stability.
• Maintains stable inductance under high current conditions.
• Facilitates smaller and thinner electronic products.
• Contributes to energy efficiency in power supply designs.

Technical Specifications:

The SPT0406A-3R9K-PF typically has an inductance value of 3.9 μH with a tolerance. The dimensions are typically 4.0mm x 4.0mm x 0.6mm. The saturation current (Isat) is the current at which the inductance drops by a specified percentage (e.g., 20%). The rated current is the maximum continuous current the inductor can handle without exceeding a specified temperature rise. The DC resistance (DCR) is a key parameter for efficiency calculations. The operating temperature range typically extends from -40°C to +125°C. Refer to the official TDK Corporation datasheet for the precise specifications including saturation current, rated current, and DCR before incorporating this component into a design.